la brie



May 29, 1928, 1,671,645

L. E. LA BRIE INTERNAL BRAKE Filed Aug. 12, 1925 71 F'/c;./ Z M c ,X as

- 4a 45 m /a INVENTOI Q ATTORNEY Patented May 29, 1928. i r

UNITEili V LOD GER ELIZE LA BRIE, OF INDIANA, ASSIGNOR 'IO BENDIZQ BRAKE COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

rn'rEnnAL BRAKE.

Application filed Aug'ust 12, 1925. Serial No. 49,738.

This invention relates to brakes, and is but showing the lever and spring arrangeillustrated as embodied in an automobile ment. with a leaf'spring; front wheel brake. An object of the inven- Fig. 4 is a Vertical section through a modition is to provide a simple arrangement of fication, on a line corresponding to the line 5 doublewrapping or ,duo-servo brake in- A-A in Fig. 3, and showing adilferent 55 cluding'a novel anchor and an improved exlever and spring arrangen'ient; and paneling device at the ends of the floating Fig. 5' is a view corresponding to Fig. 4, friction device; but showing the lever and spring arrange- In one desirable arrangement, the anchor ment of Fig. 1. is between those ends and may be adjusted In the arrangement of Figs. 1-3, the brake 60 to take up for wear; for example the'anchor includes a drum l0 and a backing plate 12, i may be a stationary cam which can be turned between which is arranged a floating fricand locked in any adjustable angular position device comprising arcuate shoes 14 and {tion I prefer to mount a swinging support 16, which are preferably identical and in- 15 on the anchor, and one feature of the inventerchangeable. 65 tionrelates to providing this support with .ietween the free ends of the shoes is an 1 a double cam or an equivalent expanding deanchor, shown double cam 18, which Vice floating with the support. can be turned to takeup for wear of the It is best to connect the expanding device brake liningand then locked by a nut 20. A with'the brake-applying shaft through a greturn spring 22 urges the shoes against 70 universal joint, which permits the'swinging the cam. of the support as thefriction device anchors A support or bracket 24 is pivotally at one end or the other. Vhen the brake mounted on a spindle portion of cam '18, so isused for a front wheel, this same unithat it can swing in either direction. This 25 versal joint is arranged in the swivelling support carries a double brake-applying cam 75 axis of the wheel, to permit steering the 26, secured on a short shaft 28 journ'alled in wheel when the brake is on. thesupport'. Shaft 28 has a cross bore in .An important feature of the invention its end for a pair of outwardly cylindrical relates to providing a lever rocked by the connecting members 30, between which a pin 30 shifting of the friction device to tension a. 32 pivotsthe flattened end of a brake-applyso spring, the spring acting when the brake is ing shaft 34. I released as automatic centering means. In I Connecting members 30 and pin 32 form the arrangement illustrated, the friction de- .a universal joint permitting support 24 to vice includes a plurality ofshoes and the swing with cam 26, as one or the other of 35 lever is carried by the floating pivot conshoes 14 orl6 anchors against cam 18. When necting the shoes. the brake is on a front wheel, this universal These and other objects and features of joint is arranged in the swivelling axis of the invention, including various novel oomthe wheel, to allow for steering movement; binations of parts and desirable particular A plate 36 carried by posts 38 passing constructions, will be apparent from'the folthrough slots in the shoesserves to position lowing description of the illustrative emhe free ends of the shoes laterally.

bodiments shown in the accompanying draw- The floating joint between the shoes is ing, in which: illustrated as comprising a pivot pin 40 pass- Fig. 1 is a. vertical section through the ing through a slot in the backing plate, and

brake, just inside the wheel; against which the shoes are held by a spring Fig. 2-is a vertical section on the line 22 42. On this pivot pin is mounted a threeof Fig. '1, showing the brake-applying arm lever. 44, having an upper arm engagmeans; p ing a stationary stop 46, a lower arm en- Fig. 3 is a horizontal section on a line gaging a stop 48, and a lateral arm carrying corresponding to the line BB of Fig. 1, a pin 50 which in Fig. 3 is engaged by a leaf spring 52 holding the upper and lower arms against the stops" Spring 50 is carried by a pin 54; on the backing plate, and its tension may be varied by an adjustable pin 56.

It now the drum is turning clockwise when the brake is applied, the upper arm of lever 44; is rocked by stop 46; if it is turning counterclockwise the lower arm of lever 44 is rocked by a stop 48; in either case the lever turns clockwise against the resistance of spring 52.

In the modification of Fig. 4, lever 144 carries two leal? springs 152 engaging the stops 46 and 48, and one or the other of which is tensioned by the rocking of the lever. In Figs. 1 and 5, a coil spring 252 is substituted for the leaf spring 52.

While several illustrative embodiments have been described in detail, it is not my intention to limit the scope of the invention to those particular embodiments, or otherwise than by the terms of the appended claims.

I claim:

1. A brake comprising, in combination, a drum, an expansible floating Friction device within the drum arranged to anchor at one end when the drum is turning in one direction and at the other end when the drum is turning in the other direction, anchoring means engaged by both ends of said device when the brake is not applied and by one end only when the brake is applied, and means for adjusting the anchoring means to vary the clearance between said device and the drum when the brake is not applied.

2. A brake comprising, in combination, a drum, an expansible floating friction device within the drum arranged to anchor at one end when the drum is turning in one direction and at the other end when the drum is turning in the other direction, an adjustable anchor between the ends of said device, means also between the ends of said device and arranged to :torce them apart against the drum, and means holding both ends of said device against the anchor when the brake is. not applied, the adjustment of the anchor serving to vary the clearance between .the friction device and drum when the brake justable to vary the clearance between the shoes and drum when the brake is not applied, and a floating expanding device engaging the ends of the friction device.

4. A brake comprising, in combination, a drum, an cxpansible floating friction device including a plurality of shoes within the drum arranged to anchor at one end when the drum is turning in one direction. and at the other end when the drum is turning in the other direction, anchor cam means ongaged, by both shoes when the brake is not applied and by one only of the shoes when the brake is applied, means to adjust the cam means to take up {or wear and preserve the desired clearance between the shoes and drum when the brake is not applied, and means to hold the cam means in any desired adjusted angular position.

5. A brake comprising, in combination, a drum, an expansible floating friction device including two different anchoring parts within the drum arranged to anchor on one of said parts when the drum is turning in one direction and on the other of said parts when the drum is turning in the other direction. stationary anchoring means engaged by both of said parts when the brake is not applied and by one partonly when the brake is applied, said anchoring means being adjustable to take up for wear and preserve the desired clearance between the friction device and drum when the brake is not applied, and being constructed and arranged to beheld in any desired adjusted position, and a brake-expanding floating device ongagii'rg the ends of the friction device.

6. A brakccomprising, in combination, a drum, an expansible floating friction device within the drum arranged to anchor at one end when the drum is turning in one direc-' tion and at the other end Whenthe drum is turning in the other direction, a stationary anchor member between the ends of said device, and a swinging brake-expanding device supported by the anchor member..

7. A brake comprising, in combination, a drum, an expansiblc floating friction device within the drum arranged to anchor at one end when the drum is turning in one direction and at the other end when the drum is turning in the other direction, a stationary anchor member between the ends of said device, a support oscillatably mounted on the anchor member, and a brake-expanding device carried by the support.

8. A brake comprising, in combination, a. drum, an oxpansible floating frictiondevice within the drum arranged to anchor at one end when the drum is turning in'one direction and at the other end when the drum is turning in the other direction, a stationary anchor between the ends of the friction device, a support mounted to swing about an axis passing through the anchor, and a brake expanding device carried by the support. I

9. A brake comprising, in combination, a

- rection and at the other end when the drum is turningin the other direction, a stationary anchor between the ends of the frictiondevice, a support mounted to swing about an axis passing through the anchor, a brakeexpanding device carried by the support, a shaft for operating said expanding device, and a universal joint connecting the shaft to the expanding device and permitting swinging movement of the support.

' 11. A brake comprising, in combination, a drum, an expansible floating friction'device within the drum arranged to anchor at one end when the drumis turning in one direction and at the other end when the drum is turning in the other direction, a stationary anchor between the ends of the friction device, a support mounted to swing about an axis passing 'throughthe anchor, a brake expanding device carried by the support, a shaft for operating said expanding device, and a universal joint connecting the shaft to the expanding device and permitting swinging movement of thesupport and also'permitting swivelling movement of the entire brake. p

12. 'A brake comprising, in combination, a drum, an expansible friction. device within the drum arranged to anchor at one end when the drum 1s turning 1n one direction and at the other end when the drum is turning in the other direction, a lever swung by movement of the friction device in either direction, and means yieldingly resisting swinging of the lever and acting through the lever to center the friction device.

13. A brake comprising, in combination,

, a drum, a backing plate, an expansible friction device within the drum, a lever swung by relative movement of the friction device and the backing plate, and means yieldingly resisting swinging of the lever and acting through the lever to center the friction debacking plate to rock the lever when the friction device is forced against the drum, and a spring resisting the rocking of the lever.

16. A brake comprising, in combination,

a drum,a friction devicewithin the drum shiftable slightly in opposite directions to wrap in either direction of drum rotation, a double lererrocked in one direction by shifting of the friction device in one direction and rocked in the same direction by shifting of the friction device in the other direction, and means yieldingly resisting locking of the lever.

17. A brake comprising, in combination, a drum,'a friction device within the drum shiftable slightly in opposite directions to wrap in either direction of drum rotation, a double lever, a pair of lever-engaging stops so arranged that the lever is rocked in one direction by shifting of the friction device in one direction. and rocked in the same direction by shifting of the friction devicein the other direction, and a spring yieldingly resisting rocking of the lever.

18. A brake comprising, incombination,

a drum, a plurality of shoes within the drum, a floating pivot bet-ween adjacent ends of the shoes, a lever mounted on the pivot, a fixed stop engaging and rocking the lever, and a spring resisting rocking of the lever.

19. Abrake comprising, in combination, a drum, a plurality of shoes within the drum shiftable slightly with the drum in either direction whenapplied, according to the direction of rotation of the drum, a floating connection between the shoes, and a single coil spring tensioned by shifting of the shoes in'either direction and serving yieldingly to center the connection when the brake is released.

20. A brake comprising, in combination, a drum, a plurality of shoes within the drum shiftable slightly with the drum in either direction when applied, according to the direction of rotation of the drum, 2. floating connection between the shoes, a device mounted to shift with the shoes and moved with respect to the shoes by said shifting, and spring means cooperating with said de vice to center the connection when the brake is released.

21. A brake comprising, in combination, a drum, a plurality of shoes within the drum shiftable slightly with the drum in either direction when applied, according to the direction of rotation of the drum, a floating connection between the shoes, and a single spring tensioned by shifting of the shoes in either direction and acting on the floating connection at one side of the shoes yieldingly to center the shoes when the brake is released. 7

22. A brake comprising, in combination, a drum, a plurality of shoes Within the drum, :1 floating pivot between adjacent ends of the shoes, :1 device engaging the pivot, and a spring connected to said device and tcnsioned by shifting of the device by inoveinent of the pivot in either direction.

A brake comprising, in combination, a drum, a backing plate at the open side of the drum, a plurality of shoes in the drum, :1 floating pivot between adjacent ends of the shoesproject-ing at onoside of the shoes, and means acting on the projecting part of the pivot yieldingl-y to resist movement of the pivot.

24 A brake comprising, in combination, a drum, a backing plate at the open side of the drum, a plurality of shoes in the drum, a floating pivot between adjacent ends of the shoes projecting at one side of the shoes through a relatively large opening in the backing plate, and parts carried by the projecting part of the pivot and lightly clamped againstopposite sides of the backing plate.

A brake comprising, in combination, a drum, a backing plate at the open side of the drum, a plurality of shoes in the drum, a floating pivot between adj acent ends ot' the shoes projecting at one side of the shoes through a relatively large opening in the backing plate, and means acting on the part 0t the-pivot between thc'shoes and the backing plate and yieldingly resisting movement of the pivot.

26. A brake comprising, in combination, a drum,a backing plate at the open side of the drum, a plurality of shoes in the drum,

a floating pivot between adjacent ends of the shoes projectingat one side of the shoes through a relatively large opening in the backing plate, a centering device between the shoes and backing plate and acting on the pivot, andv a spring tensioned by the centering device OHIDOR'GHWH'C of the pivot. 27. A brake comprising, in combination, a drum, abackingplate at the open side of the drum, a plurality ol shoes in the drum, a floating pivot between adjacent ends of the shoes projecting at one sideof the shoes through a relatively large opening in the backing plate, and a spring-operated centering device relatively narrow in width and arranged between the shoes and backing plate and acting on the pivot.

28. A brake comprising, in combination, a drum, a backing plate at the open'side of the drum, a plurality of shoes Within the drum having semi-cylindrical sockets in their adjacent ends, a pivot in said sockets projecting through a relatively large opening in the backing plate, a spring connecting the shoes and urging the sockets against opposite sides of the pivot, and means on the pivot engaging opposite sides of the backing plate to position the shoes laterally. 29. A brake comprising, in comhination,a drum, a plurality of shoes within the drum having sockets at their adjacent ends, a

pivot in said sockets, a spring connecting the shoes and urging the sockets against op- I positc sidesof the pivot, and a mounting for the pivot permitting it to shift with the shoes. I

in testimony whereof I have hereunto signed my name.

LUDGER ELIZE LA. BRIE. 

